MR MESSKO MT-ST Compact User manual

Pointer Thermometer
MESSKO® MT-ST Compact /
MESSKO® MT-ST Compact RM
Operating Instructions
BA5831400-00 EN

© All rights reserved by Messko GmbH
Dissemination and reproduction of this document and use and disclosure of its
content are strictly prohibited unless expressly permitted.
Infringements will result in liability for compensation. All rights reserved in the event
of the granting of patents, utility models or designs.
The product may have been altered since this document was published.
We reserve the right to change the technical data, design and scope of supply.
Generally the information provided and agreements made when processing the
individual quotations and orders are binding.
The original operating instructions were written in German.

Table of contents
3BA5831400-00 EN
1 Introduction...........................................................................6
1.1 Manufacturer.................................................................................... 6
1.2 Completeness.................................................................................. 6
1.3 Safekeeping..................................................................................... 6
1.4 Notation conventions ....................................................................... 6
1.4.1 Hazard communication system .................................................................... 6
1.4.2 Information system....................................................................................... 8
1.4.3 Instruction system ........................................................................................ 8
1.4.4 Typographic conventions ............................................................................. 9
2 Safety...................................................................................10
2.1 Appropriate use ............................................................................. 10
2.2 Fundamental Safety Instructions ................................................... 11
2.3 Personnel qualification................................................................... 13
2.4 Personal protective equipment ...................................................... 14
3 Product description............................................................16
3.1 Scope of delivery ........................................................................... 16
3.2 Function description....................................................................... 16
3.3 Design............................................................................................ 18
3.3.1 MESSKO Compact Standard pointer thermometer ................................... 18
3.3.2 MESSKO Compact RM pointer thermometer ............................................ 19
3.3.3 Cable glands/adapters ............................................................................... 20
3.3.4 Ventilation .................................................................................................. 21
3.3.5 Temperature sensor................................................................................... 22
3.4 Versions......................................................................................... 22
3.5 Safety markings ............................................................................. 24
3.6 Nameplate ..................................................................................... 25
4 Packaging, transport and storage ....................................26
4.1 Purpose ......................................................................................... 26

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4.2 Suitability, structure and production............................................... 26
4.3 Markings ........................................................................................ 26
4.4 Transportation, receipt and handling of shipments........................ 26
4.5 Storage of shipments..................................................................... 28
4.6 Further transport ............................................................................ 28
5 Installation and commissioning........................................29
5.1 Transporting in the installed state.................................................. 30
5.2 Checking measured temperature values ....................................... 30
5.3 Mounting the pointer thermometer................................................. 31
5.3.1 Attaching the pointer thermometer to the transformer ............................... 31
5.3.2 Securing the capillary line .......................................................................... 35
5.3.3 Inserting the temperature sensor ............................................................... 35
5.3.4 Inserting the No.7 RM temperature sensor ............................................... 38
5.3.5 Attaching the step protection (optional)...................................................... 39
5.4 Electrical connection...................................................................... 40
5.4.1 Preparation................................................................................................. 40
5.4.2 Removing the bayonet seal ring................................................................. 44
5.4.3 Opening the cover plate ............................................................................. 45
5.4.4 Preparing the cables .................................................................................. 45
5.4.5 Protective conductor connection ................................................................ 53
5.4.6 Connecting the micro-switches .................................................................. 55
5.4.7 Connecting the analog sensor (optional/TT version) ................................. 59
5.4.8 Connecting cable glands/NPT adapters..................................................... 60
5.5 Checking micro-switches ............................................................... 61
5.5.1 Micro-switch to the right of the pointer ....................................................... 61
5.5.2 Micro-switch to the left of the pointer ......................................................... 62
5.6 Setting temperature gradients (winding temperature) ................... 64
5.6.1 Gradient setting by heating current ............................................................ 64
5.6.2 Gradient setting by resistance value .......................................................... 68

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5BA5831400-00 EN
5.7 Connecting the current transformer (winding temperature) ........... 73
5.8 Closing the cover plate .................................................................. 74
5.9 Positioning the bayonet seal ring................................................... 75
6 Operation.............................................................................76
6.1 Resetting drag hands..................................................................... 76
7 Maintenance, inspection and care ....................................77
8 Disposal...............................................................................78
9 Technical data.....................................................................79
9.1 Ambient conditions ........................................................................ 79
9.2 Technical data ............................................................................... 79
10 Appendix .............................................................................83
10.1 Compact pointer thermometer dimensions.................................... 83
10.2 Compact RM pointer thermometer dimensions ............................. 84
10.3 Temperature sensor ...................................................................... 85
10.4 Step protection............................................................................... 86
10.5 Vibration-damping plate/Mounting plate ........................................ 87
10.6 Cable gland dimensions ................................................................ 88

1 Introduction
6 BA5831400-00 EN
This technical document contains detailed descriptions on the safe and
proper installation, connection, commissioning and monitoring of the prod-
uct.
This technical document is intended solely for specially trained and autho-
rized personnel.
1.1 Manufacturer
The product is manufactured by:
Messko GmbH
Gewerbegebiet An den Drei Hasen
Messko-Platz 1
61440 Oberursel
Germany
Phone: [phone]
E-mail: [email protected]
Internet: www.reinhausen.com/messko
Further information on the product and copies of this technical document are
available from this address if required.
1.2 Completeness
This technical file is incomplete without the supporting documents:
▪ Order confirmation
1.3 Safekeeping
Keep this technical file and all supporting documents ready at hand and ac-
cessible for future use at all times.
1.4 Notation conventions
This section contains an overview of the symbols and textual emphasis
used.
1.4.1 Hazard communication system
Warnings in this technical file are displayed as follows.

1 Introduction
7BA5831400-00 EN
1.4.1.1 Warning relating to section
Warnings relating to sections refer to entire chapters or sections, sub-sec-
tions or several paragraphs within this technical document. Warnings relat-
ing to sections have the following format:
WARNING
Type of danger!
Source of the danger and its consequences.
► Action
► Action
1.4.1.2 Embedded warning information
Embedded warnings refer to a particular part within a section. These warn-
ings apply to smaller units of information than the warnings relating to sec-
tions. Embedded warnings use the following format:
DANGER! Instruction for avoiding a dangerous situation.
1.4.1.3 Signal words and pictograms
The following signal words are used:
Signal word Definition
DANGER Indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING Indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
CAUTION Indicates a hazardous situation which, if not avoided, could result
in minor or moderate injury.
NOTICE Indicates measures to be taken to prevent damage to property.
Table1: Signal words in warning notices

1 Introduction
8 BA5831400-00 EN
Pictograms warn of dangers:
Pictogram Definition
Warning of a danger point
Warning of dangerous electrical voltage
Warning of combustible substances
Warning of a tipping hazard
Warning of a hot surface
Table2: Pictograms used in warning notices
1.4.2 Information system
Information is designed to simplify and improve understanding of particular
procedures. In this technical file it is laid out as follows:
Important information.
1.4.3 Instruction system
This technical file contains single-step and multi-step instructions.

1 Introduction
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Single-step instructions
Instructions which consist of only a single process step are structured as fol-
lows:
Aim of action
üRequirements (optional).
► Step 1 of 1.
ðResult of step (optional).
ðResult of action (optional).
Multi-step instructions
Instructions which consist of several process steps are structured as follows:
Aim of action
üRequirements (optional).
1. Step 1.
ðResult of step (optional).
2. Step 2.
ðResult of step (optional).
ðResult of action (optional).
1.4.4 Typographic conventions
The following typographic conventions are used in this technical file:
Typographic convention Purpose Example
UPPERCASE Operating controls,
switches
ON/OFF
[Brackets] PC keyboard [Ctrl] + [Alt]
Bold Software operating con-
trols
Press Continue button
…>…>… Menu paths Parameter > Control pa-
rameter
Italics System messages, error
messages, signals
Function monitoring alarm
triggered
[► Number of pages]. Cross reference [► 41].
Table3: Typographic conventions

2 Safety
10 BA5831400-00 EN
This technical document contains detailed descriptions on the safe and
proper installation, connection, commissioning and monitoring of the prod-
uct.
▪ Read this technical file through carefully to familiarize yourself with the
product.
▪ This technical file is a part of the product.
▪ Read and observe the safety instructions provided in this chapter in partic-
ular.
▪ Observe the warnings in this technical file in order to avoid function-re-
lated dangers.
▪ The product is manufactured on the basis of state-of-the-art technology.
Nevertheless, risks to life and limb for the user or impairment of the prod-
uct and other material assets may arise in the event of improper use.
2.1 Appropriate use
The pointer thermometer measures the temperature in transformers, shunt
reactors and similar devices. The product is intended exclusively for use in
large stationary plants and facilities of electrical power engineering. If used
as intended and in compliance with the requirements and conditions speci-
fied in this technical document as well as the warning notices contained in
this technical document and attached to the product, the product does not
pose risk of personal injury or damage to property or the environment. This
applies throughout the entire service life of the product, from delivery, instal-
lation and operation to removal and disposal.
Intended use refers to the following:
▪ Use the product only with the transformer specified in the order.
▪ Operate the product in accordance with this technical document, the
agreed-upon delivery conditions and the technical data.
▪ Ensure that any necessary work is only performed by qualified personnel.
▪ Use the equipment and special tools supplied solely for the intended pur-
pose and in accordance with the specifications of this technical document.
▪ Operate the product in electrical energy systems and facilities.
▪ Only operate the product in industrial areas.
▪ Observe the notices in this technical document regarding electromagnetic
compatibility and the technical data.

2 Safety
11BA5831400-00 EN
2.2 Fundamental Safety Instructions
To prevent accidents, disruptions and damage as well as unacceptable ad-
verse effects on the environment, those responsible for transport, installa-
tion, operation, maintenance and disposal of the product or parts of the prod-
uct must ensure the following:
Personal protective equipment
Loosely worn or unsuitable clothing increases the danger of becoming
trapped or caught up in rotating parts and the danger of getting caught on
protruding parts. This results in danger to life and limb.
▪ All necessary devices and personal protective equipment required for the
specific task, such as a hard hat, safety footwear, etc. must be worn. Ob-
serve the "Personal protective equipment" [►Section 2.4, Page 14] sec-
tion.
▪ Never wear damaged personal protective equipment.
▪ Never wear rings, necklaces or other jewelry.
▪ If you have long hair, wear a hairnet.
Work area
Untidy and poorly lit work areas can lead to accidents.
▪ Keep the work area clean and tidy.
▪ Make sure that the work area is well lit.
▪ Observe the applicable laws for accident prevention in the relevant coun-
try.
Contamination level
Moisture, dust, sweat and other conductive dirt may cause malfunctions in
the device. To ensure contamination levelII, observe the following informa-
tion:
▪ Wear assembly gloves.
▪ Ensure that no dirt or moisture enters the device when it is open.
▪ Seal the device after installation.

2 Safety
12 BA5831400-00 EN
Explosion protection
Highly flammable or explosive gases, vapors and dusts can cause serious
explosions and fire.
▪ Do not install or operate the product in areas where a risk of explosion is
present.
Safety markings
Warning signs and safety information plates are safety markings on the
product. They are an important aspect of the safety concept. Safety mark-
ings are depicted and described in the chapter "Product description".
▪ Observe all safety markings on the product.
▪ Make sure all safety markings on the product remain intact and legible.
▪ Replace safety markings that are damaged or missing.
Ambient conditions
To ensure reliable and safe operation, the product must only be operated
under the ambient conditions specified in the technical data.
▪ Observe the specified operating conditions and requirements for the in-
stallation location.
Modifications and conversions
Unauthorized or inappropriate changes to the product may lead to personal
injury, material damage and operational faults.
▪ Only modify the product after consultation with Messko GmbH.
Spare parts
Spare parts not approved by Messko GmbH may cause physical injury and
damage the product.
▪ Only use spare parts approved by the manufacturer.
▪ Contact Messko GmbH.

2 Safety
13BA5831400-00 EN
Working during operation
You must only operate the product when it is in a sound operational condi-
tion. Otherwise it poses a danger to life and limb.
▪ Regularly check the operational reliability of safety equipment.
▪ Perform the inspection tasks described in this technical document regu-
larly.
2.3 Personnel qualification
The person responsible for assembly, commissioning, operation and inspec-
tion must ensure that personnel are sufficiently qualified.
Electrically skilled person
The electrically skilled person has a technical qualification and therefore has
the required knowledge and experience, and is also conversant with the ap-
plicable standards and regulations. The electrically skilled person is also pro-
ficient in the following:
▪ Can identify potential dangers independently and is able to avoid them.
▪ Is able to perform work on electrical systems.
▪ Is specially trained for the working environment in which (s)he works.
▪ Must satisfy the requirements of the applicable statutory regulations for
accident prevention.
Electrically trained persons
An electrically trained person receives instruction and guidance from an
electrically skilled person in relation to the tasks undertaken and the poten-
tial dangers in the event of inappropriate handling as well as the protective
devices and safety measures. The electrically trained person works exclu-
sively under the guidance and supervision of an electrically skilled person.
Operator
The operator uses and operates the product in line with this technical docu-
ment. The operating company provides the operator with instruction and
training on the specific tasks and the associated potential dangers arising
from improper handling.

2 Safety
14 BA5831400-00 EN
Technical Service
We strongly recommend having repairs and retrofitting carried out by our
Technical Service department. This ensures that all work is performed cor-
rectly. If repair work is not carried out by our Technical Service department,
please ensure that the personnel who carry out the repairs are trained and
authorized to do so by Maschinenfabrik Reinhausen GmbH.
Maschinenfabrik Reinhausen GmbH
Technical Service
P.O. Box 12 03 60
93025 Regensburg
Germany
Phone: [phone]
E-mail: [email protected]
Internet: www.reinhausen.com
2.4 Personal protective equipment
Personal protective equipment must be worn during work to minimize risks to
health.
▪ Always wear the personal protective equipment required for the job at
hand.
▪ Never wear damaged personal protective equipment.
▪ Observe information about personal protective equipment provided in the
work area.
Personal protective equipment to be worn at all times
Protective clothing
Close-fitting work clothing with a low tearing
strength, with tight sleeves and with no protrud-
ing parts. It mainly serves to protect the wearer
against being caught by moving machine parts.
Safety shoes
To protect against falling heavy objects and slip-
ping on slippery surfaces.

2 Safety
15BA5831400-00 EN
Special personal protective equipment for particular environments
Safety glasses
To protect the eyes from flying parts and splash-
ing liquids.
Visor
To protect the face from flying parts and splash-
ing liquids or other dangerous substances.
Hard hat
To protect from falling and flying parts and mate-
rials.
Hearing protection
To protect from hearing damage.
Protective gloves
To protect from mechanical, thermal, and electri-
cal hazards.

3 Product description
16 BA5831400-00 EN
This chapter contains an overview of the design and function of the product.
3.1 Scope of delivery
The product is packaged with protection against moisture and is delivered as
follows:
▪ Pointer thermometer with temperature sensor
▪ Technical documents
Optional:
▪ 4...20mA analog output
▪ M25x1.5 STD (brass), WADI (brass or stainless steel) or offshore (stain-
less steel) cable gland
▪ 1/2" 14NPT adapters
▪ 3/4" 14NPT adapters
▪ ANSI or M plug connector
▪ Step protection (only in combination with sensor No. 6 VA and sensor No.
7)
Please note the following:
▪ Check the shipment against the shipping documents for completeness
▪ Store the parts in a dry place until installation
▪ The product must remain in the packaging and may only be removed im-
mediately before installation
3.2 Function description
The pointer thermometer measures the oil temperature or determines the
winding temperature in power transformers, distribution transformers or reac-
tors, depending on the version. The sensor of the pointer thermometer is lo-

3 Product description
17BA5831400-00 EN
cated in the thermometer pocket mounted in the transformer tank. The mea-
sured value is displayed directly on the pointer thermometer or, as an option,
on an analog or digital display using a signal converter.
Figure1: Example of temperature measurement and temperature display
1 Transformer 2 Pointer thermometer for winding
temperature
3 Digital signal converter 4 Transformer fan
5 SCADA 6 Digital display/analog display
7 Analog signal converter 8 Pointer thermometer for oil temper-
ature

3 Product description
18 BA5831400-00 EN
3.3 Design
3.3.1 MESSKO Compact Standard pointer thermometer
Depending on your order, the pointer thermometer features cable glands or
NPT adapters.
Figure2: Pointer thermometer
1 Temperature sensor 2 Capillary line
3 Adapters 4 Vibration-damping plate
5 Bayonet seal ring, glass pane and
gasket
6 Cover plate
7 Calibration screw 8 Drag hand reset
9 Pointer 10 Drag hands
11 Adjustable micro-switches 12 Label with serial number
The pointer thermometer is calibrated at the factory. Do not
adjust the calibration screw , or else the device's warranty
will be voided!

3 Product description
19BA5831400-00 EN
3.3.2 MESSKO Compact RM pointer thermometer
Depending on your order, the pointer thermometer features an ANSI or M
connector, cable glands or NPT adapters.
Figure3: Pointer thermometer
1 Temperature sensor 2 Capillary line
3 Adapter 4 Connector plug
5 Cover plate 6 Mounting plate
7 Calibration screw 8 Drag hand reset button
9 Pointer 10 Bayonet seal ring
11 Micro-switches 12 Drag hands
13 Label with serial number
The pointer thermometer is calibrated at the factory. Do not
adjust the calibration screw , or else the device's warranty
will be voided!

3 Product description
20 BA5831400-00 EN
3.3.3 Cable glands/adapters
Figure4: Cable glands
1 Standard cable gland 2 WADI cable gland
3 1/2" 14NPT adapter 4 3/4" 14NPT adapter